Big Contradiction: People tried to downgrade => >9.2 3DS VS be able to make NAND back up => <9.3 3DSYou can make a backup of your SysNAND without a hardmod, just get access to the GW Launcher and backup from there.
The hardmod is only required for restoring the NAND back onto a bricked device. So if he made a backup beforehand he can still fix it.